Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Physicists are exploring whether hidden dimensions and the shape of space could help explain why fundamental particles have ...

In the mid-19th century, Bernhard Riemann conceived of a new way to think about mathematical spaces, providing the foundation ...

Whether space-time exists should neither be controversial nor even conceptually challenging, given the definitions of “space-time,” “events” and “instants.” The idea that space-time exists is no more ...

In 1919, physicist Theodor Kaluza hypothesized that extra dimensions might solve some outstanding problems in physics. And while we haven't found any evidence yet for anything outside our normal ...